#include <REGX52.H>


void Delay(unsigned int xms)	//@12.000MHz
{
	unsigned char data i, j;

	while(xms--)
	{
		i = 2;
	j = 239;
	do
	{
		while (--j);
	} while (--i);
	}
		
}


void dis_digit(unsigned char loc, num)
{
	unsigned char dt[17] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00}; //0~9,a~f,void
	
	switch(loc)
	{
		case 1: P2_2 = 0, P2_3 = 0, P2_4 = 0;
		break;
		case 2: P2_2 = 1, P2_3 = 0, P2_4 = 0;
		break;
		case 3: P2_2 = 0, P2_3 = 1, P2_4 = 0;
		break;
		case 4: P2_2 = 1, P2_3 = 1, P2_4 = 0;
		break;
		case 5: P2_2 = 0, P2_3 = 0, P2_4 = 1;
		break;
		case 6: P2_2 = 1, P2_3 = 0, P2_4 = 1;
		break;
		case 7: P2_2 = 0, P2_3 = 1, P2_4 = 1;
		break;
		case 8: P2_2 = 1, P2_3 = 1, P2_4 = 1;
		break;
	}
	
	if(num <= 70 && num >= 65)
	{
		num = num - 55;
	}
	P0 = dt[num];
	
	Delay(1);
	P0 =0x00;
	
	
}